[FIX] stock: number field for stock picking record

The ``stock.picking`` record doesn't have a 'mobile' or a 'phone'
field which can be used by ``sms.composer``,thus we need to return
the ``partner_id`` field instead.

opw-3286153

closes odoo/odoo#123716

X-original-commit: 35311aecef034402eac76e60acdc2658b9c681cf
Signed-off-by: Djoumatchoua Eteil Junior (etdj) <etdj@odoo.com>
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>

addons/stock_sms/models/stock_picking.py

@@ -46,9 +46,12 @@ class Picking(models.Model):
         }
 
     def _sms_get_number_fields(self):
-        """ This method returns the fields to use to find the number to use to
-        send an SMS on a record. """
-        return ['mobile', 'phone']
+        """ No phone or mobile field is available on ``stock.picking`` model. Instead SMS will
+        fallback on partner-based computation using ``_sms_get_partner_fields``. """
+        return []
+
+    def _sms_get_partner_fields(self):
+        return ['partner_id']
 
     def _send_confirmation_email(self):
         super(Picking, self)._send_confirmation_email()